4.2
41 Ratings with 13 written Reviews
Summary
Dr. Rex Mahnensmith is an internal medicine physician who specializes in nephrology, bringing nearly five decades of medical expertise to his practice. He earned his medical degree from Yale University School of Medicine and completed his residency training at Northwestern Memorial Hospital. With 49 years of experience in medicine, Dr. Mahnensmith has developed extensive knowledge in both general internal medicine and kidney-related conditions. He provides care primarily in English.
Dr. Mahnensmith practices at multiple locations across Connecticut, including Saint Marys Hospital, Waterbury Hospital, Bradley Memorial Campus, and Charlotte Hungerford Hospital, with his primary office in Simsbury. His clinical focus includes treating back pain conditions, particularly in pregnant women and young patients. He also manages back strain injuries and performs comprehensive health assessments through metabolic testing. Patients have given him an average rating of 4.2 out of 5 stars on Vitals, …reflecting their confidence in his care.
Read More Read less Dr. Mahnensmith practices at multiple locations across Connecticut, including Saint Marys Hospital, Waterbury Hospital, Bradley Memorial Campus, and Charlotte Hungerford Hospital, with his primary office in Simsbury. His clinical focus includes treating back pain conditions, particularly in pregnant women and young patients. He also manages back strain injuries and performs comprehensive health assessments through metabolic testing. Patients have given him an average rating of 4.2 out of 5 stars on Vitals, …reflecting their confidence in his care.
Overview based on verified provider data
Quick Facts
- 49 years of experience
- speaks English
- Northwestern Memorial Hospital
- 13 written reviews
- 2 specialties
- 12 areas of expertise
- 2 board certifications
- 4 hospital affiliations
- 5 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Rex Leroy Mahnensmith has 5 locationsCompare with Similar Doctors
 |  |  | |
| Dr. Rex Leroy Mahnensmith, MD | Dr. Robin Allen, MD | Kerry L. Folkman, MSN, NP-C | Eric Harker |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | ||
| 49 Years of Experience | 23 Years of Experience | 16 Years of Experience | 25 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available |
| Speaks English | Speaks English | Speaks English | Speaks English |
| Simsbury , CT | New Britain , CT | Brookline , MA | Lyons , CO |
| Med School: Yale University School Of Medicine | Med School: Baylor College of Medicine in Houston, Texas | Med School: Regis College | Med School: Duke University School Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Rex Leroy Mahnensmith
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. Rex Leroy Mahnensmith has the following 2 specialties
Specialty Expertise
Dr. Rex Leroy Mahnensmith has the following 12 areas of expertise
Certifications, License, & Education
49 Years Experience
Dr. Rex Leroy Mahnensmith holds an expired medical license in the state of Connecticut.
Medical License
Medical Doctor with an expired medical license in the state of Connecticut that expired in 2026.
Education & Training
Residency
Completed their residency at Northwestern Memorial Hospital.
Medical School
Graduated from Yale University School Of Medicine in 1977.
NPI Number
Dr. Mahnensmith's NPI number is 1760466528.
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Frequently Asked Questions
- Where is Dr. Rex Mahnensmith's office located?
- Dr. Rex Mahnensmith's office is located at 28 Ashton Cir, Simsbury, CT, 06070.
- How can I make an appointment with Dr. Rex Mahnensmith?
- You can find contact information for Dr. Rex Mahnensmith here on Vitals.
- Does Dr. Rex Mahnensmith accept virtual/telehealth appointments?
- Dr. Rex Mahnensmith has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Which hospitals is Dr. Rex Mahnensmith affiliated with?
- Dr. Rex Mahnensmith is affiliated with Saint Marys Hospital, Waterbury Hospital, Bradley Memorial Campus, and Charlotte Hungerford Hospital.
- Does Dr. Rex Mahnensmith accept my insurance?
- You can see the insurance plans that Dr. Rex Mahnensmith accepts on their Vitals profile.
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